Mexico Cassette with Loud Squeal
The symptom where a Mexico Cassette has a loud squeal is due to a poor interconnection at the cable connector that plugs into the audio amplifier (power pack) that is located behind the glove box. Simply unplug it and clean the pins with a brass finishing brush...that should clean any non-conductive residue from the pins. Once it s clean, plug it back in and your squeal will be gone!

by Ed Ebel